Print Email Facebook Twitter A novel thermomechanical modelling framework in metal additive manufacturing process modelling Title A novel thermomechanical modelling framework in metal additive manufacturing process modelling Author Zhu, Quigyuan (TU Delft Mechanical, Maritime and Materials Engineering; TU Delft Structural Optimization and Mechanics) Contributor Ayas, C. (mentor) Degree granting institution Delft University of Technology Programme Mechanical Engineering Date 2020-12-06 Abstract Powder bed fusion (PBF) is a widely used metal additive manufacturing method where a part is built with almost no limitation on its geometrical layout. However, parts built by PBF typically suffer from distortions and residual stresses which depend on the PBF processing conditions and the geometrical layout of the part. In order to investigate this relation, a new computational tool is presented. The unique property of our methodology is to keep the total number of degrees of freedom constant by utilising a moving grid to represent a growing part with time. Thermal transients are calculated and are coupled to a mechanical boundary value problem to evaluate the evolution of temperature history and residual stresses. The significant gain in the computational efficiency of the moving grid technique is demonstrated in comparison to the state of the art models available in the literature. Subject Additive ManufacturingNumerical modelling To reference this document use: http://resolver.tudelft.nl/uuid:68522c51-0ddc-4ffc-9e32-5b3207ea98f1 Part of collection Student theses Document type master thesis Rights © 2020 Quigyuan Zhu Files PDF thesis_report.pdf 5.22 MB Close viewer /islandora/object/uuid:68522c51-0ddc-4ffc-9e32-5b3207ea98f1/datastream/OBJ/view